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Bumper beam for a vehicle

a technology for bumpers and vehicles, applied in bumpers, vehicle safety arrangments, transportation and packaging, etc., can solve problems such as inability to yield, and achieve the effect of reducing heigh

Inactive Publication Date: 2006-04-06
GESTAMP HARDTECH AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The invention provides a bumper beam that is designed to absorb energy effectively during various collisions. This is achieved by reducing the height of the beam's webs between the central portion and the side portions on both sides of the central portion."

Problems solved by technology

In particular for a rear bumper, one of the most common accidents is however a vehicle backing onto a narrow pole on a parking lot.
A bumper beam that, in a backing accident, is strong when hitting a barrier may not yield when hitting a narrow pole close to the centre of the vehicle.

Method used

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  • Bumper beam for a vehicle
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] The bumper beam shown on the figures is made of metal. It can suitably be made of hardenable sheet steel that is hot-stamped and hardened in a single step in the so called press-hardening process. The high-strength steel may have a yield strength over 1200 MPa (N / mm2) or over 1500 MPa.

[0011] The bumper beam is a hat beam (it has a hat profile) with a central flange 11, two webs 12,13 and two side flanges 14,15. The side flanges have upstanding edges 16,17. The beam has two fastening portions 18,19 in one and the same plane. These fastening portions are fastened to supporting parts 20,21 of the vehicle. The webs 12,13, and thus the profile height of the beam, are high in the central portion 24 of the beam and in connection with the fastening portions 18,19, but they are considerably lower In the portions 25,26 therebetween. The web height in the portions with reduced height 25,26 should be at most ¾, rather 213 or preferably at most half of the web height at the central porti...

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PUM

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Abstract

A bumper beam for a vehicle in the form of a hat beam is adapted to be mounted with its opening facing outwards from the vehicle. The beam has a web height that varies along the beam. The web height in portions (25, 26) between a central portion (24) and fastening portions (18, 19) on each side of the central portion has a reduce web height as compared with both the central portion and the side portions.

Description

[0001] This is a continuation-in-part of International Application PCT / SE2004 / 000842, with an international filing date of Jun. 2, 2004.TECHNICAL FIELD [0002] This invention relates to a bumper beam for a vehicle in the form of a hat beam adapted to be mounted with its opening facing outwards from the vehicle. TECHNICAL BACKGROUND [0003] Usually, one wants to make bumper beams as stiff as possible so that their collapsing is delayed when they hit a barrier. In particular for a rear bumper, one of the most common accidents is however a vehicle backing onto a narrow pole on a parking lot. A bumper beam that, in a backing accident, is strong when hitting a barrier may not yield when hitting a narrow pole close to the centre of the vehicle. It will instead fold and collapse completely. WO 00 / 66400 shows a bumper beam in the form of a hat beam that has its web height reduced towards its centre. OBJECT OF INVENTION AND BRIEF DESCRIPTION OF THE INVENTION [0004] It is an object of the inven...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B60R19/02B60R19/18
CPCB60R19/18B60R2019/1826B60R19/023
Inventor KARLANDER, LARS
Owner GESTAMP HARDTECH AB